Reflecting the name of 'this' in a Kotlin extension function
Is there a way to get the name of 'this' in an extension function?
fun Boolean?.persist() {
if (this == null) return // Do Nothing
val nameOfVariable:String = //get the name of the variable?
// Persist variable
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(nameOfVariable, this).apply()
}
android reflection kotlin kotlin-extension kotlin-reflect asked Nov 23 '18 at 5:54
Crocodile
2,49042849
add a comment |
Is there a way to get the name of 'this' in an extension function?
fun Boolean?.persist() {
if (this == null) return // Do Nothing
val nameOfVariable:String = //get the name of the variable?
// Persist variable
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(nameOfVariable, this).apply()
}
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
1
YourBooleanisn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.
– Marko Topolnik
Nov 23 '18 at 8:49
add a comment |
Is there a way to get the name of 'this' in an extension function?
fun Boolean?.persist() {
if (this == null) return // Do Nothing
val nameOfVariable:String = //get the name of the variable?
// Persist variable
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(nameOfVariable, this).apply()
}
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
Is there a way to get the name of 'this' in an extension function?
fun Boolean?.persist() {
if (this == null) return // Do Nothing
val nameOfVariable:String = //get the name of the variable?
// Persist variable
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(nameOfVariable, this).apply()
}
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
asked Nov 23 '18 at 5:54
Crocodile
2,49042849
2,49042849
1
YourBooleanisn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.
– Marko Topolnik
Nov 23 '18 at 8:49
add a comment |
1
YourBooleanisn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.
– Marko Topolnik
Nov 23 '18 at 8:49
1
1
Your
Boolean isn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.– Marko Topolnik
Nov 23 '18 at 8:49
Your
Boolean isn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.– Marko Topolnik
Nov 23 '18 at 8:49
add a comment |
2 Answers
2
active
oldest
votes
What you intend to do is not possible. You'd have to provide the nameOfVariable as a parameter. The extension function could be called on any value not being backed by a variable as well.
Delegated Properties could be an alternative for your needs.
answered Nov 23 '18 at 8:27
tynn
19.4k54375
add a comment |
I think you can't do that. As workaround pass name as a parameter:
fun Boolean?.persist(name: String) {
// ...
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(name, this).apply()
}
answered Nov 23 '18 at 8:20
Sergey
2,32821630
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
What you intend to do is not possible. You'd have to provide the nameOfVariable as a parameter. The extension function could be called on any value not being backed by a variable as well.
Delegated Properties could be an alternative for your needs.
answered Nov 23 '18 at 8:27
tynn
19.4k54375
add a comment |
What you intend to do is not possible. You'd have to provide the nameOfVariable as a parameter. The extension function could be called on any value not being backed by a variable as well.
Delegated Properties could be an alternative for your needs.
answered Nov 23 '18 at 8:27
tynn
19.4k54375
add a comment |
What you intend to do is not possible. You'd have to provide the nameOfVariable as a parameter. The extension function could be called on any value not being backed by a variable as well.
Delegated Properties could be an alternative for your needs.
answered Nov 23 '18 at 8:27
tynn
19.4k54375
What you intend to do is not possible. You'd have to provide the nameOfVariable as a parameter. The extension function could be called on any value not being backed by a variable as well.
Delegated Properties could be an alternative for your needs.
answered Nov 23 '18 at 8:27
tynn
19.4k54375
answered Nov 23 '18 at 8:27
tynn
19.4k54375
answered Nov 23 '18 at 8:27
tynn
19.4k54375
answered Nov 23 '18 at 8:27
tynn
19.4k54375
19.4k54375
add a comment |
add a comment |
I think you can't do that. As workaround pass name as a parameter:
fun Boolean?.persist(name: String) {
// ...
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(name, this).apply()
}
answered Nov 23 '18 at 8:20
Sergey
2,32821630
add a comment |
I think you can't do that. As workaround pass name as a parameter:
fun Boolean?.persist(name: String) {
// ...
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(name, this).apply()
}
answered Nov 23 '18 at 8:20
Sergey
2,32821630
add a comment |
I think you can't do that. As workaround pass name as a parameter:
fun Boolean?.persist(name: String) {
// ...
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(name, this).apply()
}
answered Nov 23 '18 at 8:20
Sergey
2,32821630
I think you can't do that. As workaround pass name as a parameter:
fun Boolean?.persist(name: String) {
// ...
PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(name, this).apply()
}
answered Nov 23 '18 at 8:20
Sergey
2,32821630
answered Nov 23 '18 at 8:20
Sergey
2,32821630
answered Nov 23 '18 at 8:20
Sergey
2,32821630
answered Nov 23 '18 at 8:20
Sergey
2,32821630
2,32821630
add a comment |
add a comment |
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1
Your
Booleanisn't a variable, it's an object. A reference to the object may be stored in zero, one, two, ten, or any other number of variables.– Marko Topolnik
Nov 23 '18 at 8:49